Mainframe & COBOL Services
COBOL Development Services for Mainframe & iSeries
Our COBOL development services cover new code for your Mainframe and iSeries platforms, new features for the applications your business runs on, and fixes for the issues that hold them back.
Why it matters
COBOL development for systems that can't stop
Your core systems keep absorbing change: new features from the business, new rules from regulators, new requirements from the card networks. Each change has to land in production without disturbing the transactions that run every second of the day.
Our design rule is to change as little of the core as possible. Wherever we can, the work happens in the I/O modules and copybooks, so the business logic you rely on stays as it is.
What we do
What our COBOL development services include
- New COBOL programs and features for CICS and batch
- Changes to existing business applications
- Identifying and fixing issues in production code
- Card-network and compliance mandates
- New back-end functions for web services and channels
- Work on Mainframe and iSeries platforms
In practice
Changes we're often asked to make
- PCI PIN key-block handling (TR-31 / TR-34)
- EMV support at the ATM
- Card BIN range expansion
- Card-network cryptogram and authentication updates
- Regulatory rule changes
- New functions for web services and digital channels
- ATM, POS and merchant host interfaces
- Key handling across HSMs
How we work
Not a body shop. Not a slide consultancy.
Senior only
Experienced engineers with deep mainframe backgrounds. The engineers named in the scope do the work.
Fixed scope, fixed fee
Every engagement is scoped in writing and priced before week one, with milestone billing.
Change as little of the core as possible
We work in the I/O modules and copybooks, keep your business logic, and prove changes before cutover.
U.S. team
U.S. citizens on U.S. payroll. No offshore handoff.
Engagement models
Flexible ways to work together
On-site
In person at your locations.
Remote
Flexible and lower cost.
Short- or long-term
For as long as you need us.
Fixed-scope
Contract programming as a defined project.
Platforms
Where we work
- z/OS
- CICS
- DB2
- IMS
- JCL
- VSAM
- iSeries / RPG
Pair it with AI for COBOL
Local AI that helps your team understand and document COBOL systems, inside your perimeter.
FAQ
COBOL development services: FAQ
Which platforms do your COBOL developers work on?
z/OS, CICS, DB2, IMS, JCL, VSAM and iSeries / RPG. CV Systems' own products are written in COBOL on CICS-based platforms, so our engineers work in the same environment as your team.
Do you write new COBOL programs or only change existing ones?
Both. We develop new COBOL programs and features for CICS and batch, and we change existing business applications, keeping changes to the core as small as possible.
Are your COBOL developers U.S.-based?
Yes. U.S. citizens on U.S. payroll, on-site or remote, with no offshore handoff.
How is COBOL development work priced?
Every engagement is scoped in writing and priced before week one, with milestone billing.
Hire COBOL programmers for your mainframe project.
U.S.-based COBOL engineers, on-site or remote, short-term, long-term or as a fixed-scope contract project.